This app develops quick mental math skills for elementary and middle grades students. To begin, you have a puzzle board that looks like a Sudoku puzzle filled in. In each square of 9 numbers, 2 of the...More: lessons, discussions, ratings, reviews,...

The object of this game is to fill the whole addition table with the numbered tiles. Users can pick up and drag each tile to its correct cell with the mouse. If the cell in the table is clicked, its a...More: lessons, discussions, ratings, reviews,...

This module can be used as a starting point for learning different methods of mental multiplication. It offers factsheets, worksheets, games, and a quiz at three levels of difficulty. A "For Tutors" p...More: lessons, discussions, ratings, reviews,...

First level in a set of three Number Triangle activities. They are an electronic version of flash cards emphasizing fact families. An addition/subtraction Number Triangle has two addends and a sum; a ...More: lessons, discussions, ratings, reviews,...

Second level in a set of three Number Triangle activities. They are an electronic version of flash cards emphasizing fact families. An addition/subtraction Number Triangle has two addends and a sum; a...More: lessons, discussions, ratings, reviews,...

The Times Table module can be used as a starting point for learning a particular table; a reinforcement of number patterns and tables already covered; and practicing knowledge of tables. Linked resour...More: lessons, discussions, ratings, reviews,...

This material is based upon work supported by the
National Science Foundation under Grant DUE-0226284.
Any opinions, findings, and conclusions or recommendations
expressed in this material are those of the author(s)
and do not necessarily reflect the views of the
National Science Foundation.